a)Sin30=1/2
Tg45=1
Cos30=radical 3 /2
Ctg60=1/radical 3
1/2+1/2(se simplifica radical din 3) =2/2=1
b)sin60=radical 3/2
Cos 60=1/2
Sin 30=1/2
Cos 30 =radical 3/2
Sin 45 =1/radical 2
Cos 45 =1/radical 2
Radical 3/4+radical 3/4 -1/2
2xradical din 3/4 -2/4 =2radical din 3-2 /4
